Lever for operating variable electric speed boxes



9 193350 A. ANDERN LEVER FOR OPERATING VARIABLE ELECTRIC SPEED BOXES Filed Sept. 17, 1954 INVENTOR ATTORNEY Patented Dec. 17, 1935 UNITED STATES PATENT OFFICE LEVER FOR OPERATING VARIABLE ELECTRIC SPEED BOXES 1 Claim.

This invention relates to remote controls for electric switches employed on electrically operated machinery and has for the primary object the provision of a device of this character which may be mounted on any convenient part of a machine and connected to the conventional type of electrical control switch whereby the latter may be easily and quickly actuated with safety to the operator.

With these and other objects in view this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention,

reference is to be had to the following description and accompanying drawing, in which Figure 1 is a side elevation illustrating a remote control connected to an electrical control switch and constructed in accordance with my invention.

Figure 2 is a vertical sectional view showing the remote control.

Figure 3 is a sectional view taken at right angles to the illustration made by Figure 2.

Figure 4 is a sectional view taken on the line 44 of Figure 2.

Figure 5 is a sectional view taken on the line 55 of Figure 3.

Figure 6 is a plan view illustrating one of the arms forming a part of an adjustable bell crank lever.

Figure 7 is a detail sectional View taken on the line 'l'l of Figure 2.

Referring in detail to the drawing, the numeral l indicates a conventional type of electrical control switch having the usual pivotally mounted operating lever 2 to which my invention is connected. The location of the control switch I is 0 not always accessible and convenient for the operator and the application of the remote control forming the subject matter of the present invention to the switch permits safe and easy operation thereof.

45 The remote control consists of a casing 3 equipped with an attaching flange 4 so that the casing may be conveniently mounted to a support which may be the machine employing the electrical control switch I. The upper end of the 50 casing is curved and provided with a slot 5 through which operates a handle or lever B. The inner end of the lever or handle is pivotally mounted, as shown at I, and above the pivot is secured an extension 8 to which is pivoted a link 9. Pivoted in the casing below the pivoted end of the handle or lever 6 is a bell crank lever ID, the arm portion l I of which is pivoted to the link 9 while the other arm portion I2 operates 5 through a slot i3 formed in the casing and to which a connecting rod [4 is adjustably secured. The rod 54 is in turn pivotally connected to the lever 2 of the switch 4. The pivot or journal for the bell crank lever 53 is indicated by the char- 10 acter l5 and has journaled thereon the enlarged ends l6 of the arm portions II and [2. The opposing faces of the enlarged portions [6 are provided with teeth ll adapted to mesh for looking the arm portions against relative movement. 15 The journal I 5 is screw threaded and has threaded thereon nuts i8 arranged at opposite sides of the enlarged portions [6 and providing means whereby said enlarged portions may be separated to disengage the teeth for the purpose of permit- 20 ting the arm portions H and l2 to be adjusted relative to one another for the purpose of varying the throw of the bell crank lever.

A removable knob 19 is carried by the free end of the handle or lever 6 and is preferably con- 25 structed of insulated material providing safety to the operator against electrical shocks originating at the switch I Having described the invention, I claim:

A remote control for switches comprising a 30 vertically arranged casing having slots, one arranged in the top Wall of said casing and the other located in a side wall thereof, an operating lever entering said casing by Way of the slot in the top wall of said casing and having its inner end 5 pivoted to said casing, a threaded pivot pin secured in the casing and in a plane below and in vertical alignment with the pivot of said lever, a bell crank lever including separable arms having a journal portion mounted on the pivot pin and provided with serrated opposed faces and arranged in intermeshing engagement whereby the angle of the arms with respect to one another may be varied and one of said arms extending through the slot of the side Wall of said casing and adapted for connection to a switch, a link pivoted to the other arm, means threaded to said pivot pin to retain the serrated faces intermeshed, and an extension secured to the operating lever and extending at right angles thereto and pivoted to said link.

ARTHUR ANDERSON. 

